kolab 2.2

[Ingo Steuwer]

Hello,

Am Freitag, 24. Oktober 2008 schrieb Gabriele Di Giambelardini:
> After login imapd take 100% cpu

logfiles would really help...

Regards 
Ingo Steuwer

>
>
> ________________________________
> Da: Ingo Steuwer <steuwer at univention.de>
> A: kolab-users at kolab.org
> Cc: Gabriele Di Giambelardini <gabriele_d_g at yahoo.it>
> Inviato: Venerdì 24 ottobre 2008, 12:20:22
> Oggetto: Re: kolab 2.2
>
> Hello,
>
> Am Freitag, 24. Oktober 2008 schrieb Gabriele Di Giambelardini:
> > Ok after many many tests, the imapd service use all the CPU only when an
> > user use the horde webmail.... Any solution??
>
> during login or the whole session? Is it connected with a special use-case?
>
> You might enable user-specific logfiles in cyrus or increase the loglevel
> to get an impression of what imapd "does".
>
> Regards
> Ingo Steuwer
>
> > ________________________________
> > Da: Gabriele Di Giambelardini <gabriele_d_g at yahoo.it>
> > A: Ingo Steuwer <steuwer at univention.de>; kolab-users at kolab.org
> > Inviato: Venerdì 24 ottobre 2008, 9:17:55
> > Oggetto: Re: kolab 2.2
> >
> >
> > Thanks, But I don't know the why in my htop I see the imap have a 100% of
> > CPU... There is some parameter or something I should do ??
> > thanks
> >
> >
> >
> >
> > ________________________________
> > Da: Ingo Steuwer <steuwer at univention.de>
> > A: kolab-users at kolab.org
> > Cc: Gabriele Di Giambelardini <gabriele_d_g at yahoo.it>
> > Inviato: Venerdì 24 ottobre 2008, 8:34:26
> > Oggetto: Re: kolab 2.2
> >
> > Hi,
> >
> > Am Donnerstag, 23. Oktober 2008 schrieb Gabriele Di Giambelardini:
> > > Hi to all, I have a big problem with kolab 2 performance.
> > > I have an server with 10 GB of RAM and about 150000 users.
> >
> > Once they are imported into LDAP and the mail-spools are created, the
> > pure amount of users should not be the problem, but the number of current
> > users and the number/size of deliviered mails. We installed a kolab-based
> > mailserver with ~80000 users (mailaccounts) and Horde webmail on a far
> > smaller hardware (one server, 2GB RAM) years ago.
> >
> > > After I imported the user in the kolab ldap the server become very very
> > > slow, it's impossible use a webmail. so I installed the webmail on
> > > other server with eaccelerator. But now on my main server the kolab
> > > imapd take all the CPU and every thing is too slow. The are some
> > > settings for imap of if somebody know the why of this latency... THANKS
> >
> > We [1] had trouble with cyrus and horde getting slow in large
> > installations because of a very inefficient group-ACL-computing of cyrus.
> > In some cases it helps to activate "nscd" with large cache sizes (mhm, I
> > don't know if nscd is part of a standard Kolab-distributon?), in other
> > scenarios we deactivated this in Cyrus' imapd.conf (unix_group_enable:
> > no) - which is OK as long as group ACLs are not required. But this might
> > also be slightly different in plain Kolab.
> >
> > You should try to figure out what the imapd really does. Is it during a
> > login, mail-delivery, folder-operations etc.; maybe imapd is only waiting
> > for something else (Disk I/O, LDAP, ...)?
> >
> > Regards
> > Ingo Steuwer
> >
> > [1] Please note that we don't use the openpkg-distribution of kolab but a
> > derivated installation based on Debian with patches and configurations
> > similar to/derived from plain kolab.
> >
> > >       Scopri il blog di Yahoo! Mail:
> > > Trucchi, novità e scrivi la tua opinione.
> > > http://www.ymailblogit.com/blog



-- 
Ingo Steuwer           Projektmanagement        steuwer at univention.de
Univention GmbH        Linux for your Business  fon: +49 421 22 232-43
Mary-Somerville-Str.1  28359 Bremen             mob: +49 173 2112971
                       http://www.univention.de fax: +49 421 22 232-99